Key Features 

• 4-level, 500,000 sq. ft. parking structure for University’s CEFCU football stadium and new tennis and soccer facilities

• New outdoor multi-use athletic field adjacent to the new parking structure

• Generally undeveloped demolition site with a multitude of new utility installations

Geotechnical Challenges 

• Soft soil conditions susceptible to settlement under foundation loads

• Liquefaction hazard zone, with layers of loose fine sands and soft non-plastic silts, combined with shallow water table

• Large areas of undocumented fill and debris from relic demolitions at the site

• Clayey subgrade heavily disturbed and softened by wet season work

Innovative Solutions

• Aggregate vibro-pier ground improvement program to increase bearing capacity and mitigate potential settlement

• Construction-phase assessment of undocumented fill and debris locations and depths; recommendations and consultation for utilization of re-usable materials

• Lime-treatment and geosynthetic subgrade stabilization